When used in conjunction with police light bars, Eco-Friendly Safety Flare helps maximize size of safety zone at scene of roadside emergency. Formulation, which is 100% free of potassium perchlorate, eliminates chemical management concerns. Free of any loose red phosphorous, cap minimizes sparking and splatter upon lighting and also increases storage safety. Flares come in re-sealable EZ Store Box with plastic pouch to maximize shelf life and performance.